Well strainer



D. J. HAMM WELL STRAINER Nov. 6, 1934.

Filed July 8, 1933 3nventor j. Jfflarrmz \lflLy Patented Nov. 6, 1934 T A T if PATENT OFFICE 1 Claim.

This invention relates to strainers designed for use at the lower ends of driven weil tubes, the primary object of the invention being to provide a strainer which will not clog, and one which may be rotated while the strainer is being positioned.

A further object of the invention is the provision of a strainer wherein the outer wall and ends thereof present smooth surfaces to the end that the tube with its strainer may be readily and easily removed.

A still further object of the invention is the provision of a screen or strainer which will not lose its gauge when pressure is applied, with the result that the strainer or screen may be readily cleaned of all foreign matter.

With the foregoing and other objects in view, which will appear as the description proceeds, the invention resides in the combination and arrangement of parts and in the details of construction hereinafter described and claimed, it being understood that changes in the precise embodiment of the invention herein disclosed, may be made within the scope of What is claimed, without departing from the spirit of the invention.

Referring to the drawing:

Figure l is an elevational view of a well strainer constructed'in accordance withthe invention, a portion thereof being shown in section.

Figure 2 is a sectional view taken on line 2-2 of Figure 1.

Figure 3 is a sectional view taken on line 33 of Figure 1.

Referring to the drawing in detail, the device comprises a body portion 5 which is in the form of a length of pipe, the upper end thereof being threaded as at 6, the lower end of the pipe being threaded as at 7.

Formed in the body portion 5, are a plurality of openings indicated at 8, the openings being disposed in spaced relation with each other, and arranged in rows, the number of openings being regulated by the size of the pipe or body portion 5.

Secured to the body portion 5, and extended longitudinally thereof are spaced bars 9, which bars have their inner edges beveled as at 10, throughout portions of their widths, providing passageways with wide inner portions, which act to free material, that may find its way into the body portion 5, through the passageways, thereby insuring against the passageways becoming clogged to defeat the purpose of the invention.

These bars 9 are secured to the body portion 5, by means of rivets 11, however it is to be understood that these bars may be secured to the body portion, in any suitable manner.

The passageways formed between adjacent bars 9, are so arranged that they overlie the openings 8, with the result that material passing through the passageways may pass into the body portion 5, through the openings 8.

The reference character 12 designates an upper ring member, that is of a width to cover the upper ends of the bars 9, while the lower ends of the bars 9 are covered and protected, by means of the ring member 13, the ring members being secured in any suitable manner.

In the use of the device, the body portion is secured to the well tubing at a point near the lower end thereof, the ends of the body portion being threaded to cooperate with threads of the well tubing as clearly shown by the drawing.

It will of course be understood that the inner surfaces of the bars 9 rest against the body portion 5, where they are held in close engagement with the body portion 5, by the securing means.

Having thus described the invention what is claimed is:

A strainer for driven well tubes, comprising a cylindrical pipe section having threaded ends, said pipe section having vertically extending elongated openings therein disposed in spaced vertical rows around the pipe and in spaced relation with each other in the row, an outer casing embodying a plurality of parallel vertical bars disposed exteriorly of the pipe section, said bars being spaced apart and their inner edges being beveled to provide elongated passageways widening inwardly, the passageways formed by the bars being disposed over the adjacent elongated openings, and in the same axial planes, and means for securing the bars to the pipe section.

DANIEL JEFFERSON HAMM. 

